This week, the 5th graders played some probability games where the possible outcomes were unequally likely. One of them involved an interesting way of assigning homework. A teacher had a bag labeled "Heads" with one red cube in it and a bag labeled "Tails" with 3 red and 4 blue cubes in it. He flipped a coin, picked out of the appropriate bag, and if he picked a red, there would be homework. Blue meant no homework. Can you figure out the probability of getting homework vs. not getting homework? At home, students will redesign the rules so that the probability of not getting homework is greater than that of having homework.
HW: p. 13 and 15
In 4th grade, I did a magic number trick for the kids, and by the end of the class session, everyone was able to use algebra to figure out how the trick works. I told them to try it out on family and friends at home. It's sure to amaze them!
HW: Finish p. 8 and complete p. 9 using your new number trick cards that you made up.
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